Population parameters and reproductive biology of Otolithes ruber (Bloch & Schneider, 1801) (Teleostei: Sciaenidae) in the northern Makran Sea

Ghasem Farkhondeh, M. Safaie, E. Kamrani, T. Valinassab
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引用次数: 9

Abstract

This study was conducted to determine some biological aspects of the tiger tooth croaker Otolithes ruber in the coastal waters of the northern Makran/Oman Sea. Monthly total length frequency data of O. ruber were collected by bottom gill-net and bottom trawl from August 2016 to August 2017. ELEFAN-I method in the software package FISAT-II was used to analyze of the length frequency data. The total length and weight relationship demonstrated that growth in this species is negative allometric. The asymptotic total length ( TL∞ ) was estimated as 60 and 65cm for males and females, respectively. The growth parameter K was calculated as 0.43 y -1 for males and 0.40 y -1 for females. The total mortality, natural mortality and fishing mortality rates were estimated as 1.85, 0.83 and 1.02 for males and 1.37, 0.77 and 0.60 for females. The exploitation rates were estimated at 0.44 for males and 0.55 for females. The sex ratio revealed that it was not a constant 1:1 throughout the year, with 58 % for females. The Gonado-Somatic Index (GSI) showed upswing trend from January to June, and the maximum GSI was 7.1±0.6 in April. The recorded result showed that the tiger tooth croaker can spawn all year round and have a spawning peak from April to June (spring season). The Lm 50 % was estimated at 43.3cm of total length.
马兰海北部Otolithes ruber (Bloch & Schneider, 1801) (Teleostei: Sciaenidae)的种群参数和生殖生物学
本研究旨在确定马可兰/阿曼海北部沿海水域虎牙鱼Otolithes ruber的一些生物学方面。2016年8月至2017年8月,采用底刺网和底拖网采集了橡胶胶鱼的月总长度频次数据。采用FISAT-II软件包中的ELEFAN-I方法对长度频率数据进行分析。总长度与总重的关系表明,该物种的生长为负异速生长。雄性和雌性的渐近总长度(TL∞)分别为60和65cm。生长参数K雄性为0.43 y -1,雌性为0.40 y -1。雄性总死亡率、自然死亡率和捕捞死亡率分别为1.85、0.83和1.02,雌性分别为1.37、0.77和0.60。雄性和雌性的剥削率分别为0.44和0.55。性别比显示,全年的性别比不是1:1不变,女性的性别比为58%。性腺-躯体指数(GSI)在1 ~ 6月呈上升趋势,4月GSI最大值为7.1±0.6。记录结果表明,虎牙鱼全年可产卵,4 - 6月为产卵高峰期(春季)。50%的Lm全长估计为43.3cm。
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来源期刊
Iranian Journal of Ichthyology
Iranian Journal of Ichthyology Agricultural and Biological Sciences-Aquatic Science
CiteScore
0.70
自引率
0.00%
发文量
0
期刊介绍: Iranian Journal of Ichthyology (IJI) is a peer-reviewed journal for publication of high quality papers on any aspect of ichthyology and will be published 4 times a year by the Iranian Society of Ichthyology (http://www.isi-org.ir). The journal welcomes the submission of manuscripts that meets the general criteria of significance and scientific excellence, and will publish original scientific articles in the fields of ichthyology. The editors welcome the submission of original manuscripts including Research Articles, Short communications, and Views & News. Review papers by distinguished authors and Special Issues will also be considered. It is our aim to provide the international scientific community with an efficiently published journal, meeting high scientific and technical standards. Scopes of Iranian Journal of Ichthyology includes: Systematics, taxonomy, morphology, anatomy, biogeography, biodiversity, conservation, ecology and general biology of fishes (reproduction, food and feeding habits, age and growth, population dynamics, etc.). Papers on freshwater, brackish, marine and fossil fishes will be considered.
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